Cr (VI) Removal from Aqueous Solution Using Starch and Sodium Carboxymethyl Cellulose-Coated Fe and Fe /Ni Nanoparticles
Bin Ji 1,2,3
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School of Urban Construction, Wuhan University of Science and Technology, Wuhan 430065, China
Hubei Key Laboratory for Efficient Utilization and Agglomeration of Metallurgic Mineral Resources, Wuhan University of Science and Technology, Wuhan, 430081, China
Hubei Key Laboratory of Regional Development and Environmental Response, Hubei University, Wuhan, 430062, China
Submission date: 2017-11-27
Final revision date: 2018-01-08
Acceptance date: 2018-01-23
Online publication date: 2018-06-29
Publication date: 2018-07-09
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Bin Ji   

Wuhan University of Sicence and Technology, Wuhan University of Sicence and Technology, 430065 Wuhan, China
Pol. J. Environ. Stud. 2018;27(6):2785-2792
Starch and sodium carboxymethyl cellulose-coated Fe and Fe /Ni nanoparticles were synthesized and their Cr (VI) removal capabilities were evaluated and compared. We found that starch and sodium carboxymethyl cellulose-coated nanoscale zero-valent iron-nickel (SS-nZVI-Ni) showed the better Cr (VI) removal performance. The effect of acidic conditions on Cr(VI) removal by SS-Nzvi-Ni revealed that the Cr (VI) removal efficiency by SS-nZVI-Ni reached the maximum of 95.70% at pH = 2. The effect of different initial Cr (VI) concentrations showed that SS-nZVI-Ni performed well at a high Cr(VI) concentration. Langmuir-Hinshelwood first-order kinetic model could describe the reduction process well. SEM images revealed that SS-nZVI-Ni had a large surface area, which discarded the problem of aggregation. XRD and XPS analysis of SS-nZVI-Ni showed that SS-nZVI-Ni and Cr (III) formed an alloy on the surface of SS-nZVI-Ni after the reaction. The study provides an option for practical application of SS-nZVI-Ni in Cr (VI) removal.
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